Help with Custom Marlin Firmware Build for Ender 3 – Issue with BLTouch

Hey everyone,

I am trying to build a custom Marlin firmware for my Ender 3 using the firmware builder…, but I am running into issues with BLTouch not deploying properly during homing. I followed the standard setup in the firmware builder, enabling AUTO_BED_LEVELING_BILINEAR and BLTOUCH;, but when I try to home, the probe doesn’t deploy, and the printer tries to crash into the bed.

Here’s what I have checked so far:

Wiring: Double-checked all connections, and the BLTouch lights up as expected.
M280 Commands: Manually tested with M280 P0 S10 and M280 P0 S90, and the probe responds correctly.
Servo Pin Config: I’ve confirmed that the correct pin is set for my board.

Is there something I might be missing in the firmware configuration, or does this sound like a hardware issue: ?? Any help would be greatly appreciated !! I have also read this thread https://marlin.crc.id.au/forum/t/help-with-firmware-builder-ccsp but still looking for more tips and help.

Thanks in advance !!

With Regards,
Derek Theler